Repository navigation
Expand file tree
/
Copy pathtest_testing_support.py
More file actions
250 lines (217 loc) · 12.7 KB
/
Copy pathtest_testing_support.py
File metadata and controls
250 lines (217 loc) · 12.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
"""Unit tests for testing support
"""
import logging
import os
import sys
import unittest
import astropy.units as u
import numpy
from astropy.coordinates import SkyCoord
from arl.data.data_models import Skycomponent
from arl.data.polarisation import PolarisationFrame
from arl.image.operations import export_image_to_fits
from arl.imaging.base import predict_skycomponent_visibility
from arl.util.testing_support import create_low_test_image_from_s3, create_named_configuration, create_test_image, \
create_low_test_beam, create_blockvisibility_iterator, create_low_test_image_from_gleam, \
create_low_test_skycomponents_from_gleam, create_low_test_image_composite
from arl.visibility.base import create_visibility, create_blockvisibility
from arl.visibility.coalesce import coalesce_visibility
from arl.visibility.operations import append_visibility
log = logging.getLogger(__name__)
log.setLevel(logging.DEBUG)
log.addHandler(logging.StreamHandler(sys.stdout))
log.addHandler(logging.StreamHandler(sys.stderr))
class TestTesting_Support(unittest.TestCase):
def setUp(self):
self.dir = './test_results'
os.makedirs(self.dir, exist_ok=True)
self.frequency = numpy.linspace(1e8, 1.5e8, 3)
self.channel_bandwidth = numpy.array([2.5e7, 2.5e7, 2.5e7])
self.flux = numpy.array([[100.0], [100.0], [100.0]])
self.phasecentre = SkyCoord(ra=+15.0 * u.deg, dec=-35.0 * u.deg, frame='icrs', equinox='J2000')
self.config = create_named_configuration('LOWBD2-CORE')
self.times = numpy.linspace(-300.0, 300.0, 3) * numpy.pi / 43200.0
nants = self.config.xyz.shape[0]
assert nants > 1
assert len(self.config.names) == nants
assert len(self.config.mount) == nants
def createVis(self, config, dec=-35.0, rmax=None):
self.config = create_named_configuration(config, rmax=rmax)
self.phasecentre = SkyCoord(ra=+15 * u.deg, dec=dec * u.deg, frame='icrs', equinox='J2000')
self.vis = create_visibility(self.config, self.times, self.frequency,
channel_bandwidth=self.channel_bandwidth,
phasecentre=self.phasecentre, weight=1.0,
polarisation_frame=PolarisationFrame('stokesI'))
def test_named_configurations(self):
for config in ['LOWBD2', 'LOWBD2-CORE', 'LOWBD1', 'LOFAR']:
self.createVis(config)
assert self.config.size() > 0.0
self.createVis('VLAA', +35.0)
self.createVis('VLAA_north', +35.0)
def test_clip_configuration(self):
for rmax in [100.0, 3000.0, 1000.0, 3000.0, 10000.0, 30000.0, 100000.0]:
self.config = create_named_configuration('LOWBD2', rmax=rmax)
assert self.config.size() > 0.0
def test_unknown_configuration(self):
with self.assertRaises(ValueError):
self.config = create_named_configuration("SKA1-OWL")
def test_create_test_image(self):
im = create_test_image(canonical=False)
assert len(im.data.shape) == 2
im = create_test_image(canonical=True)
assert len(im.data.shape) == 4
im = create_test_image(canonical=True, frequency=numpy.array([1e8]),
polarisation_frame=PolarisationFrame(
'stokesI'))
assert len(im.data.shape) == 4
assert im.data.shape[0] == 1
assert im.data.shape[1] == 1
im = create_test_image(canonical=True, frequency=numpy.array([1e8]),
polarisation_frame=PolarisationFrame(
'stokesIQUV'))
assert len(im.data.shape) == 4
assert im.data.shape[0] == 1
assert im.data.shape[1] == 4
def test_create_low_test_image_from_gleam(self):
im = create_low_test_image_from_gleam(npixel=256, cellsize=0.001,
channel_bandwidth=self.channel_bandwidth,
frequency=self.frequency,
phasecentre=self.phasecentre,
kind='cubic', flux_limit=1.0)
assert im.data.shape[0] == 3
assert im.data.shape[1] == 1
assert im.data.shape[2] == 256
assert im.data.shape[3] == 256
export_image_to_fits(im, '%s/test_test_support_test_support_low_gleam.fits' % (self.dir))
def test_create_low_test_image_from_gleam_with_pb(self):
im = create_low_test_image_from_gleam(npixel=256, cellsize=0.001,
channel_bandwidth=self.channel_bandwidth,
frequency=self.frequency,
phasecentre=self.phasecentre,
kind='cubic',
applybeam=True, flux_limit=1.0)
assert im.data.shape[0] == 3
assert im.data.shape[1] == 1
assert im.data.shape[2] == 256
assert im.data.shape[3] == 256
export_image_to_fits(im, '%s/test_test_support_low_gleam_with_pb.fits' % (self.dir))
def test_create_low_test_image_composite(self):
im = create_low_test_image_composite(npixel=256, cellsize=0.001,
channel_bandwidth=self.channel_bandwidth,
frequency=self.frequency,
phasecentre=self.phasecentre,
kind='cubic',
threshold=0.050, fov=20)
assert im.data.shape[0] == 3
assert im.data.shape[1] == 1
assert im.data.shape[2] == 256
assert im.data.shape[3] == 256
export_image_to_fits(im, '%s/test_test_support_low_composite.fits' % (self.dir))
def test_create_low_test_skycomponents_from_gleam(self):
sc = create_low_test_skycomponents_from_gleam(flux_limit=1.0,
phasecentre=SkyCoord("17h20m31s", "-00d58m45s"),
polarisation_frame=PolarisationFrame("stokesI"),
frequency=self.frequency, kind='cubic', radius=0.001)
assert len(sc) == 1, "Only expected one source, actually found %d" % len(sc)
assert sc[0].name == 'GLEAM J172031-005845'
self.assertAlmostEqual(sc[0].flux[0, 0], 301.49254315737829, 7)
def test_create_low_test_image_from_s3(self):
im = create_low_test_image_from_s3(npixel=1024, channel_bandwidth=numpy.array([1e6]),
frequency=numpy.array([1e8]),
phasecentre=self.phasecentre, fov=10)
assert im.data.shape[0] == 1
assert im.data.shape[1] == 1
assert im.data.shape[2] == 1024
assert im.data.shape[3] == 1024
export_image_to_fits(im, '%s/test_test_support_low_s3.fits' % (self.dir))
def test_create_low_test_image_s3_spectral(self):
im = create_low_test_image_from_s3(npixel=1024, channel_bandwidth=numpy.array([1e6, 1e6, 1e6]),
frequency=numpy.array([1e8 - 1e6, 1e8, 1e8 + 1e6]),
phasecentre=self.phasecentre, fov=10)
assert im.data.shape[0] == 3
assert im.data.shape[1] == 1
assert im.data.shape[2] == 1024
assert im.data.shape[3] == 1024
def test_create_low_test_image_s3_spectral_polarisation(self):
im = create_low_test_image_from_s3(npixel=1024, channel_bandwidth=numpy.array([1e6, 1e6, 1e6]),
polarisation_frame=PolarisationFrame("stokesIQUV"),
frequency=numpy.array([1e8 - 1e6, 1e8, 1e8 + 1e6]), fov=10)
assert im.data.shape[0] == 3
assert im.data.shape[1] == 4
assert im.data.shape[2] == 1024
assert im.data.shape[3] == 1024
export_image_to_fits(im, '%s/test_test_support_low_s3.fits' % (self.dir))
def test_create_low_test_beam(self):
im = create_test_image(canonical=True, cellsize=0.002,
frequency=numpy.array([1e8 - 5e7, 1e8, 1e8 + 5e7]),
channel_bandwidth=numpy.array([5e7, 5e7, 5e7]),
polarisation_frame=PolarisationFrame("stokesIQUV"),
phasecentre=self.phasecentre)
bm = create_low_test_beam(model=im)
export_image_to_fits(bm, '%s/test_test_support_low_beam.fits' % (self.dir))
assert bm.data.shape[0] == 3
assert bm.data.shape[1] == 4
assert bm.data.shape[2] == im.data.shape[2]
assert bm.data.shape[3] == im.data.shape[3]
# Check to see if the beam scales as expected
for i in [30, 40]:
assert numpy.max(numpy.abs(bm.data[0, 0, 128, 128 - 2 * i] - bm.data[1, 0, 128, 128 - i])) < 0.02
assert numpy.max(numpy.abs(bm.data[0, 0, 128, 128 - 3 * i] - bm.data[2, 0, 128, 128 - i])) < 0.02
assert numpy.max(numpy.abs(bm.data[0, 0, 128 - 2 * i, 128] - bm.data[1, 0, 128 - i, 128])) < 0.02
assert numpy.max(numpy.abs(bm.data[0, 0, 128 - 3 * i, 128] - bm.data[2, 0, 128 - i, 128])) < 0.02
def test_create_vis_iter(self):
vis_iter = create_blockvisibility_iterator(self.config, self.times, self.frequency,
channel_bandwidth=self.channel_bandwidth,
phasecentre=self.phasecentre,
weight=1.0, polarisation_frame=PolarisationFrame('stokesI'),
integration_time=30.0, number_integrations=3)
fullvis = None
totalnvis = 0
for i, vis in enumerate(vis_iter):
assert vis.nvis
if i == 0:
fullvis = vis
totalnvis = vis.nvis
else:
fullvis = append_visibility(fullvis, vis)
totalnvis += vis.nvis
assert fullvis.nvis == totalnvis
def test_create_vis_iter_with_model(self):
model = create_test_image(canonical=True, cellsize=0.001, frequency=self.frequency,
phasecentre=self.phasecentre)
comp = Skycomponent(direction=self.phasecentre, frequency=self.frequency, flux=self.flux,
polarisation_frame=PolarisationFrame('stokesI'))
vis_iter = create_blockvisibility_iterator(self.config, self.times, self.frequency,
channel_bandwidth=self.channel_bandwidth,
phasecentre=self.phasecentre, weight=1.0,
polarisation_frame=PolarisationFrame('stokesI'),
integration_time=30.0, number_integrations=3, model=model,
components=comp)
fullvis = None
totalnvis = 0
for i, vis in enumerate(vis_iter):
assert vis.phasecentre == self.phasecentre
assert vis.nvis
if i == 0:
fullvis = vis
totalnvis = vis.nvis
else:
fullvis = append_visibility(fullvis, vis)
totalnvis += vis.nvis
assert fullvis.nvis == totalnvis
def test_predict_sky_components_coalesce(self):
sc = create_low_test_skycomponents_from_gleam(flux_limit=10.0,
polarisation_frame=PolarisationFrame("stokesI"),
frequency=self.frequency, kind='cubic',
phasecentre=SkyCoord("17h20m31s", "-00d58m45s"),
radius=0.1)
self.config = create_named_configuration('LOWBD2-CORE')
self.phasecentre = SkyCoord("17h20m31s", "-00d58m45s")
sampling_time = 3.76
self.times = numpy.arange(0.0, + 300 * sampling_time, sampling_time)
self.vis = create_blockvisibility(self.config, self.times, self.frequency, phasecentre=self.phasecentre,
weight=1.0, polarisation_frame=PolarisationFrame('stokesI'),
channel_bandwidth=self.channel_bandwidth)
self.vis = predict_skycomponent_visibility(self.vis, sc)
cvt = coalesce_visibility(self.vis, time_coal=1.0)
assert cvt.cindex is not None